DLC stands for 'Diamond Like Carbon' this coating gives the minimal amount of surface friction due to its smooth surface qualitiesThis allows the nozzle needle to cycle faster resulting in better needle response and improvement in fuel quantity control.

The life of the DLC Nozzles is significantly improved (around 30%) over non-DLC type nozzles.

A .205 and .216 nozzle will drop right into a 90 or 110 Engine almost smoke free without the need for a re-tune and are also perfect to max out the stock turbo once re-mapped.

.280's are for Big Turbo setups, the .300's and above are not for the faint-hearted and will push a LOT of fuel, especially when coupled with a 11mm IP